drm/amdgpu: fix user ptr race condition

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: monk liu <monk.liu@amd.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index ad5b9c676fd8..e8409fea4bf1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -37,6 +37,7 @@ void amdgpu_gem_object_free(struct drm_gem_object *gobj)
         if (robj) {
                 if (robj->gem_base.import_attach)
                         drm_prime_gem_destroy(&robj->gem_base, robj->tbo.sg);
+                amdgpu_mn_unregister(robj);
                 amdgpu_bo_unref(&robj);
         }
 }